如何在 pygame 返回主页？

Question

我有一个 Pygame 程序，它有一个 'Home' 屏幕，该屏幕有 5 个按钮，按下这些按钮会调用一个新功能，为每个不同的按钮打开一个不同的屏幕。对于这些屏幕中的每一个，我都在右上角添加了一个小 'Home' 按钮，以便用户可以从任何调用的屏幕返回到 'Home' 屏幕。

import pygame
window = pygame.display.set_mode((1500, 800), pygame.RESIZABLE)

def common_screen():
    button("Home", 1400, 0, 100, 50, (0,200,0), (255,255,210), home_intro) **#Problem at this point**
    *#do something else too*

def text_objects(text, font):
    textSurface = font.render(text, True, (0,0,0))
    return textSurface, textSurface.get_rect()

def button(msg, x, y, w, h, ic, ac, action):
    mouse = pygame.mouse.get_pos()
    click = pygame.mouse.get_pressed()
    if x+w > mouse[0] > x and y+h > mouse[1] > y:
        pygame.draw.rect(window, ac, (x, y, w, h))
        if click[0] == 1:
            action()
    else:
        pygame.draw.rect(window, ic, (x, y, w, h))
    smallText = pygame.font.SysFont(None, 20)
    textSurf, textRect = text_objects(msg, smallText)
    textRect.center = ((x+(w/2)), (y+(h/2)))
    window.blit(textSurf, textRect)

def home_intro():
    run = True
    while run:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False
                 
        window.blit(image, (0,0))
        pygame.display.set_caption("PROGRAM")
        button("Start", 150, 450, 100, 50, (0,200,0), (255,255,210), start)
        button("Screen 1", 150, 450, 100, 50, (0,200,0), (255,255,210), screen1)
        button("Screen 2", 150, 450, 100, 50, (0,200,0), (255,255,210), screen2)
        button("Stop", 550, 450, 100, 50, (0,200,0), (255,255,210), stop)
        if game_state == 'screen1':
            common_screen()

        pygame.display.flip()


home_intro()
pygame.quit()
quit()

common_screen() 函数在右上角创建了一个 'Home' 按钮，但是如果我使用 home_intro() 作为其中 button() 函数的最后一个参数，它会导致递归错误。每次回到主页面都要调用main函数，好像不对。创建新函数没有意义，因为它与 home_intro() 函数相同。

Answer 1

不要递归调用home_intro，而是添加并调用一个改变game_state变量的函数：

def home():
    global game_state
    game_state = "home" 

def common_screen():
    button("Home", 1400, 0, 100, 50, (0,200,0), (255,255,210), home)

def home_intro():
    global game_state

    run = True
    while run:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False
                 
        window.blit(image, (0,0))
        pygame.display.set_caption("PROGRAM")
        button("Start", 150, 450, 100, 50, (0,200,0), (255,255,210), start)
        button("Screen 1", 150, 450, 100, 50, (0,200,0), (255,255,210), screen1)
        button("Screen 2", 150, 450, 100, 50, (0,200,0), (255,255,210), screen2)
        button("Stop", 550, 450, 100, 50, (0,200,0), (255,255,210), stop)
        if game_state == 'screen1':
            common_screen()

        pygame.display.flip()

如何在 pygame 返回主页？

How to go back to main page in pygame?

python

pygame

button